Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins
Krill are vital as food for many marine animals but also impacted by global warming. To learn how they and other zooplankton may adapt to a warmer world we studied local adaptation in the widespread Northern krill (Meganyctiphanes norvegica). We assemble and characterize its large genome and compare...
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ftcopenhagenunip:oai:pure.atira.dk:publications/edc29ebf-3baf-4778-84f3-2a853b2c0fbf 2024-09-15T18:18:24+00:00 Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins Unneberg, Per Larsson, Mårten Olsson, Anna Wallerman, Ola Petri, Anna Bunikis, Ignas Vinnere Pettersson, Olga Papetti, Chiara Gislason, Astthor Glenner, Henrik Cartes, Joan E. Blanco-Bercial, Leocadio Eriksen, Elena Meyer, Bettina Wallberg, Andreas 2024 application/pdf https://curis.ku.dk/portal/da/publications/ecological-genomics-in-the-northern-krill-uncovers-loci-for-local-adaptation-across-ocean-basins(edc29ebf-3baf-4778-84f3-2a853b2c0fbf).html https://doi.org/10.1038/s41467-024-50239-7 https://curis.ku.dk/ws/files/401785230/s41467_024_50239_7.pdf eng eng info:eu-repo/semantics/openAccess Unneberg , P , Larsson , M , Olsson , A , Wallerman , O , Petri , A , Bunikis , I , Vinnere Pettersson , O , Papetti , C , Gislason , A , Glenner , H , Cartes , J E , Blanco-Bercial , L , Eriksen , E , Meyer , B & Wallberg , A 2024 , ' Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins ' , Nature Communications , vol. 15 , 6297 . https://doi.org/10.1038/s41467-024-50239-7 article 2024 ftcopenhagenunip https://doi.org/10.1038/s41467-024-50239-7 2024-09-02T14:28:57Z Krill are vital as food for many marine animals but also impacted by global warming. To learn how they and other zooplankton may adapt to a warmer world we studied local adaptation in the widespread Northern krill (Meganyctiphanes norvegica). We assemble and characterize its large genome and compare genome-scale variation among 74 specimens from the colder Atlantic Ocean and warmer Mediterranean Sea. The 19 Gb genome likely evolved through proliferation of retrotransposons, now targeted for inactivation by extensive DNA methylation, and contains many duplicated genes associated with molting and vision. Analysis of 760 million SNPs indicates extensive homogenizing gene-flow among populations. Nevertheless, we detect signatures of adaptive divergence across hundreds of genes, implicated in photoreception, circadian regulation, reproduction and thermal tolerance, indicating polygenic adaptation to light and temperature. The top gene candidate for ecological adaptation was nrf-6, a lipid transporter with a Mediterranean variant that may contribute to early spring reproduction. Such variation could become increasingly important for fitness in Atlantic stocks. Our study underscores the widespread but uneven distribution of adaptive variation, necessitating characterization of genetic variation among natural zooplankton populations to understand their adaptive potential, predict risks and support ocean conservation in the face of climate change. Article in Journal/Newspaper Meganyctiphanes norvegica Northern krill University of Copenhagen: Research Nature Communications 15 1 |
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Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Krill are vital as food for many marine animals but also impacted by global warming. To learn how they and other zooplankton may adapt to a warmer world we studied local adaptation in the widespread Northern krill (Meganyctiphanes norvegica). We assemble and characterize its large genome and compare genome-scale variation among 74 specimens from the colder Atlantic Ocean and warmer Mediterranean Sea. The 19 Gb genome likely evolved through proliferation of retrotransposons, now targeted for inactivation by extensive DNA methylation, and contains many duplicated genes associated with molting and vision. Analysis of 760 million SNPs indicates extensive homogenizing gene-flow among populations. Nevertheless, we detect signatures of adaptive divergence across hundreds of genes, implicated in photoreception, circadian regulation, reproduction and thermal tolerance, indicating polygenic adaptation to light and temperature. The top gene candidate for ecological adaptation was nrf-6, a lipid transporter with a Mediterranean variant that may contribute to early spring reproduction. Such variation could become increasingly important for fitness in Atlantic stocks. Our study underscores the widespread but uneven distribution of adaptive variation, necessitating characterization of genetic variation among natural zooplankton populations to understand their adaptive potential, predict risks and support ocean conservation in the face of climate change. |
format |
Article in Journal/Newspaper |
author |
Unneberg, Per Larsson, Mårten Olsson, Anna Wallerman, Ola Petri, Anna Bunikis, Ignas Vinnere Pettersson, Olga Papetti, Chiara Gislason, Astthor Glenner, Henrik Cartes, Joan E. Blanco-Bercial, Leocadio Eriksen, Elena Meyer, Bettina Wallberg, Andreas |
spellingShingle |
Unneberg, Per Larsson, Mårten Olsson, Anna Wallerman, Ola Petri, Anna Bunikis, Ignas Vinnere Pettersson, Olga Papetti, Chiara Gislason, Astthor Glenner, Henrik Cartes, Joan E. Blanco-Bercial, Leocadio Eriksen, Elena Meyer, Bettina Wallberg, Andreas Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
author_facet |
Unneberg, Per Larsson, Mårten Olsson, Anna Wallerman, Ola Petri, Anna Bunikis, Ignas Vinnere Pettersson, Olga Papetti, Chiara Gislason, Astthor Glenner, Henrik Cartes, Joan E. Blanco-Bercial, Leocadio Eriksen, Elena Meyer, Bettina Wallberg, Andreas |
author_sort |
Unneberg, Per |
title |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_short |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_full |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_fullStr |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_full_unstemmed |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_sort |
ecological genomics in the northern krill uncovers loci for local adaptation across ocean basins |
publishDate |
2024 |
url |
https://curis.ku.dk/portal/da/publications/ecological-genomics-in-the-northern-krill-uncovers-loci-for-local-adaptation-across-ocean-basins(edc29ebf-3baf-4778-84f3-2a853b2c0fbf).html https://doi.org/10.1038/s41467-024-50239-7 https://curis.ku.dk/ws/files/401785230/s41467_024_50239_7.pdf |
genre |
Meganyctiphanes norvegica Northern krill |
genre_facet |
Meganyctiphanes norvegica Northern krill |
op_source |
Unneberg , P , Larsson , M , Olsson , A , Wallerman , O , Petri , A , Bunikis , I , Vinnere Pettersson , O , Papetti , C , Gislason , A , Glenner , H , Cartes , J E , Blanco-Bercial , L , Eriksen , E , Meyer , B & Wallberg , A 2024 , ' Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins ' , Nature Communications , vol. 15 , 6297 . https://doi.org/10.1038/s41467-024-50239-7 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-024-50239-7 |
container_title |
Nature Communications |
container_volume |
15 |
container_issue |
1 |
_version_ |
1810456534050668544 |